Sinopec’s utility model patent for “a thermal nitrogen gas stripping and dewatering system for coarse slag” has been granted

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Sinopec (600028) has newly obtained a utility model patent grant, titled “A Thermal Nitrogen Stripping Dehydration System for Rough Slag”, with application number CN202421405108.4; the grant date is April 4, 2025. Patent Abstract: This application relates to the field of water-coal slurry gasification technology, and provides a hot nitrogen gas stripping and dewatering system for coarse slag. It includes a high-temperature nitrogen supply device and a conical slag hopper (1); a valve (6) is installed at the discharge port of the conical slag hopper (1), and several nitrogen inlet pipes (2) that are connected to the internal space of the conical slag hopper (1) are provided on its outer side wall. Each of these nitrogen inlet pipes (2) is connected to the high-temperature nitrogen supply device ； The inner wall of the conical slag hopper (1) is equipped with an anti-clogging ventilation plate (3). By introducing high-temperature nitrogen into the conical slag hopper, the moisture in the coarse slag can be effectively stripped away, reducing its water content. This prevents the formation of black water, thereby minimizing the negative environmental impacts associated with the transportation and processing of the coarse slag, as well as reducing the costs involved in its treatment.